Huacaraje Airport (BVK) has no lounge, a direct result of the thin airline-service picture across Bolivia's remote Beni department rather than any oversight: this is a small airstrip served mainly by light aircraft and limited regional operators rather than a scheduled airline network built around premium travel.
Service to fields like Huacaraje typically runs through small regional or charter operators connecting scattered Beni communities, prioritizing basic connectivity over frequency or comfort. That kind of thin, irregular service is exactly why a dedicated lounge, or any premium facility, was never part of the picture here: there simply is not the passenger volume or airline-schedule structure that would support one, and that is unlikely to change while traffic stays this light.
Trinidad, the capital of Beni department, is the nearest real regional hub, with a larger airport and more consistent scheduled service than a small strip like Huacaraje, though even Trinidad's own lounge provision stays modest, since it remains a regional rather than a major international airport, useful mainly as a connecting point rather than a lounge stop.
Santa Cruz de la Sierra's Viru Viru International Airport is where Bolivia's fuller lounge picture actually exists, as the country's main international gateway and busiest airport. Airline and pay-in lounge options there serve the premium-cabin and long-haul traffic that a Beni airstrip like Huacaraje was never built to support, a genuine contrast in scale between the two ends of a single domestic itinerary. If your trip connects a remote Beni leg with international travel, Santa Cruz is where that connection, and any realistic lounge access, happens.
Given how thin the regional airline network is across Beni, build flexibility into any itinerary that includes a strip like Huacaraje, and confirm current routing and Santa Cruz lounge details directly with your airline before you travel, since service to fields this size can change with little notice.